--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nashorn/samples/astviewer.js	Wed May 07 20:20:58 2014 +0530
@@ -0,0 +1,98 @@
+#// Usage: jjs -scripting -fx astviewer.js -- <scriptfile>
+
+/*
+ * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ *   - Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 
+ *   - Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ * 
+ *   - Neither the name of Oracle nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+if (!$OPTIONS._fx) {
+    print("Usage: jjs -scripting -fx astviewer.js -- <.js file>");
+    exit(1);
+}
+
+// Using JavaFX from Nashorn. See also:
+// http://docs.oracle.com/javase/8/docs/technotes/guides/scripting/nashorn/javafx.html
+
+// This example shows AST of a script file as a JavaFX
+// tree view in a window. If no file is specified, AST of
+// this script file is shown. This script demonstrates
+// 'load' function, JavaFX support by -fx, readFully function
+// in scripting mode.
+
+// JavaFX classes used
+var StackPane = Java.type("javafx.scene.layout.StackPane");
+var Scene     = Java.type("javafx.scene.Scene");
+var TreeItem  = Java.type("javafx.scene.control.TreeItem");
+var TreeView  = Java.type("javafx.scene.control.TreeView");
+
+// Create a javafx TreeItem to view a AST node
+function treeItemForASTNode(ast, name) {
+    var item = new TreeItem(name);
+    for (var prop in ast) {
+       var node = ast[prop];
+       if (typeof node == 'object') {
+           if (node == null) {
+               // skip nulls
+               continue;
+           }
+
+           if (Array.isArray(node) && node.length == 0) {
+               // skip empty arrays
+               continue;
+           }
+
+           var subitem = treeItemForASTNode(node, prop);
+       } else {
+           var subitem = new TreeItem(prop + ": " + node);
+       }
+       item.children.add(subitem);
+    }
+    return item;
+}
+
+// do we have a script file passed? if not, use current script
+var sourceName = arguments.length == 0? __FILE__ : arguments[0];
+
+// load parser.js from nashorn resources
+load("nashorn:parser.js");
+
+// read the full content of the file and parse it 
+// to get AST of the script specified
+var ast = parse(readFully(sourceName));
+
+// JavaFX start method
+function start(stage) {
+    stage.title = "AST Viewer";
+    var rootItem = treeItemForASTNode(ast, sourceName);
+    var tree = new TreeView(rootItem);
+    var root = new StackPane();
+    root.children.add(tree);
+    stage.scene = new Scene(root, 300, 450);
+    stage.show();
+}